Abstract
The research was performed to determine the influence of microstructural evolution at interfaces on the subsequent uniaxial tensile properties of Ti/Ni multi-layered composites. The microstructure and chemical composition of the interfaces were examined. The fracture feature of the tensile samples was studied. At longer annealing time, the diffusion regions between Ti and Ni elements from a single side changed to two sides and became thicker. The tensile strength of the annealed composites decreased initially, and then was slightly increased after 60 h. The elongation increased significantly relative to the original rolled samples. Fractography revealed brittle fracture areas produced in the Ti/Ni interfaces. The failure mode in the annealed Ti/Ni composites was a typical ductile mixed brittle fracture.
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